Rockstar Original vs 5-hour Energy (regular): which has more caffeine?

5-hour Energy (regular) has more caffeine than Rockstar Original on both counts: 200mg per 1.93 oz shot against 160mg per 16 oz can, and about 104mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.

Rockstar Original vs 5-hour Energy (regular): the numbers

Sources: Rockstar Original's figure is verified in our Rockstar Original caffeine guide against Rockstar product page (source); 5-hour Energy (regular)'s figure is verified in our 5-hour Energy (regular) guide against 5-hour Energy facts page (source).

The concentration gap is the striking part: 5-hour Energy (regular) packs roughly 10 times the caffeine per ounce. Sipping speed matters at that density; a 1.93 oz shot finished in minutes hits differently than the same milligrams spread over a slow cup.

Which one should you pick?

Pick Rockstar Original when you want the lighter dose or a slower ramp, and 5-hour Energy (regular) when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.

For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

Related reading

• Rockstar Original: the full caffeine guide
• 5-hour Energy (regular): the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index

FAQ

Does Rockstar Original or 5-hour Energy (regular) have more caffeine? 5-hour Energy (regular): 200mg per 1.93 oz shot versus 160mg per 16 oz can for Rockstar Original.

Which is stronger per ounce? 5-hour Energy (regular), at about 103.6mg per fluid ounce versus 10.0mg for Rockstar Original.